Variables
inlineread onlyAUTO_ADD:ScrollbarVisibility = 0
Adds a scrollbar only if the content is higher than the container. When the scrollbar is not there, it give a bit more width to the content as the space for the scrollbar is free.
inlineread onlyAUTO_ADD_STAY:ScrollbarVisibility = 1
Like AUTO_ADD, but when the scrollbar is added, it stays,
even if the content fits again within the visible area later.
This can be useful to prevent continuous inner width changes
and scrollbar appearing and disappearing over and over
again when the content height varies many times. The only way to
make the scrollbar disappear again would be to increase the
height of the window itself so that the current content fits in it.
inlineread onlyAUTO_SHOW:ScrollbarVisibility = 2
Show a scrollbar only if the content is higher than the container. When the scrollbar is not visible, the content doesn't have more width than when the scrollbar is visible. The extra width is always reserved for the scrollbar, which is only hidden in the hierarchy as needed, not really removed entirely.
inlineread onlyALWAYS:ScrollbarVisibility = 3
The scrollbar is always included and visible, given that the container has a fixed height.